Based on sales for the week ending April 21, 2013

16. The Night Circus
Erin Morgenstern, Anchor, $15, 9780307744432

17. The Sandcastle Girls
Chris Bohjalian, Vintage, $15.95, 9780307743916

18. Rules of Civility
Amor Towles, Penguin, $16, 9780143121169

19. The Black Box
Michael Connelly, Grand Central, $14.99, 9781455526956

20. The Snow Child
Eowyn Ivey, Reagan Arthur/Back Bay Books, $14.99, 9780316175661

21. The Yard
Alex Grecian, Berkley, $16, 9780425261279

22. Death Comes to Pemberley
P.D. James, Vintage, $15, 9780307950659

23. Wool
Hugh Howey, S&S, $15, 9781476733951

24. World War Z
Max Brooks, Three Rivers, $14.95, 9780307346612

25. Wolf Hall
Hilary Mantel, Picador, $16, 9780312429980

26. State of Wonder
Ann Patchett, Harper Perennial, $15.99, 9780062049810

27. Canada
Richard Ford, Ecco Press, $15.99, 9780061692031

28. Fifty Shades of Grey
E.L. James, Vintage, $15.95, 9780345803481

29. Fifty Shades Freed
E.L. James, Vintage, $15.95, 9780345803504

30. The Art of Hearing Heartbeats
Jan-Philipp Sendker, Other Press, $14.95, 9781590514634

31. Orphan Train: Novel
Christina Baker Kline, Morrow, $14.99, 9780061950728

32. The Forgotten
David Baldacci, Grand Central, $14.99, 9781455523153

33. The Expats
Chris Pavone, Broadway, $15, 9780770435721

34. 1Q84
Haruki Murakami, Vintage, $16.95, 9780307476463

35. Billy Lynn's Long Halftime Walk
Ben Fountain, Ecco, $14.99, 9780060885618

36. Cloud Atlas
David Mitchell, Random House, $15, 9780812984415

37. Stag's Leap
Sharon Olds, Knopf, $16.95, 9780375712258

38. Fifty Shades Darker
E.L. James, Vintage, $15.95, 9780345803498

39. The Limpopo Academy of Private Detection
Alexander McCall Smith, Anchor, $14.95, 9780307472991

40. The Alchemist
Paulo Coelho, HarperOne, $14.99, 9780061122415

41. Calico Joe
John Grisham, Bantam, $14, 9780345536648

42. Sharp Objects
Gillian Flynn, Three Rivers, $14, 9780307341556

43. Fahrenheit 451
Ray Bradbury, S&S, $11.99, 9781451673319

44. Swamplandia!
Karen Russell, Vintage, $14.95, 9780307276681

45. Alif the Unseen
G.Willow Wilson, Grove Press, $16, 9780802121226

46. The 100-Year-Old Man Who Climbed Out the Window and Disappeared
Jonas Jonasson, Hyperion, $15.99, 9781401324643

47. The Kingmaker's Daughter
Philippa Gregory, Touchstone , $16, 9781451626087

48. The Silver Linings Playbook
Matthew Quick, Sarah Crichton Books, $15, 9780374533571

49. Dark Places
Gillian Flynn, Three Rivers, $14, 9780307341570

50. What We Talk About When We Talk About Anne Frank
Nathan Englander, Vintage, $15, 9780307949608